package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
         password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 增加员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
           //System.out.println(Thread.currentThread().getId());
           //整体思路 将employeeDTO的数据copy到一个emolyee的部分数据上
           Employee employee = new Employee();
           //然后剩下的数据自己赋值好再封装
           BeanUtils.copyProperties(employeeDTO, employee);
           //设置默认状态码
           employee.setStatus(StatusConstant.ENABLE);//1 正常 0 不正常
           //设置默认密码
           employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
           //设置创建时间和修改时间
           //employee.setCreateTime(LocalDateTime.now());
           //employee.setUpdateTime(LocalDateTime.now());
           //设置当前记录创建人和修改人的id
           //TODO:后期需要修改为当前登录用户的id
           //从线程的局部变量获取值
           //employee.setCreateUser(BaseContext.getCurrentId());
           //employee.setUpdateUser(BaseContext.getCurrentId());
           //数据封装好则调用mapper层的方法
           employeeMapper.insert(employee);

    }

    /**
     * 分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
           //借助分页查询 //开始分页
           PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
           //调用mapper层，接受结果,page的泛型为要查询的表对应的实体泛型
           Page<Employee> page=employeeMapper.queryPage(employeePageQueryDTO);
           //返回结果
           return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 根据动态条件动态更新
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
           //这是更新操作，我们不妨在持久层专门写一个处理动态条件拼接的update
           //使用builder创建并管理一个对象
           Employee employee=Employee.builder().status(status).id(id).build();
           //调用mapper层方法
           employeeMapper.update(employee);
    }

    /**
     * 查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        //调用mapper层方法
        Employee employee=employeeMapper.getById(id);
        return employee;
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee =new Employee();
        //employeeDTO转化成empleyee
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置其他属性
        //employee.setUpdateTime(LocalDateTime.now());
        //employee.setUpdateUser(BaseContext.getCurrentId());
        //调用mapper层方法
        employeeMapper.update(employee);
    }

}
